For no particular reason you end up with an error message: Outlook Mac Office 365 Sorry, we’re having server problems, so we can’t add Office 365 SharePoint right now. Please try again later”

This starts to ask you for two or three factor authentication on your email accounts that are based on Office 365 product. My issues started December 2016

To Resolve this error:

1. Make sure you have quitted Outlook and other Office apps. Go to KeyChain Access

2. Search “Exchange” under Login –> All Items and delete everything 3. Search “Office” and delete everything 4. Search “ADAL” and delete everything 5. Launch Outlook 6. You will get the activation prompt. If the account is already added, you will see the password prompt for app and ADAL again. Please do 2-Factor Authentication if asked. And then you should be able to login.

Cannot be sure what changed at Microsoft end to cause this, but obviously it is related to certificates.

Author: InteractiveWebs

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